Geoengineering Info Profile picture
Apr 29, 2023 7 tweets 6 min read Read on X
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧵
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200°C and 300°C."
3/7 ImageImage
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2."
#DAC
4/7 Image
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0°C temperatures or with
integration of water harvesting, respectively."
#DAC
5/7 ImageImage
📖 Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here ⬇️
cell.com/cell-reports-p…

#DirectAirCapture
#CarbonDioxideRemoval

6/7

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More from @geoengineering1

Feb 6
🚨🗞️Monthly #SolarGeoengineering Updates (Jan 2026)🗞️🚨

From U.S. withdrawal from global climate bodies & anti-geoengineering bills, to SAI uncertainty tool, Arctic field trials & funding calls, SRM stayed at the nexus of sci & geopolitics.

Top 10 SRM Highlights (Jan'26)🧵1/11 Image
1️⃣ 𝗨.𝗦. 𝗲𝘅𝗶𝘁𝘀 𝗨𝗡𝗙𝗖𝗖𝗖 & 𝗜𝗣𝗖𝗖 - Experts warn withdrawal could weaken SRM governance, deepen geopolitical mistrust, and accelerate fragmented or unilateral approaches.

2/11 Image
2️⃣ 𝗔𝗻𝘁𝗶-𝗴𝗲𝗼𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗯𝗶𝗹𝗹𝘀 𝗶𝗻 𝘁𝗵𝗲 𝗨.𝗦. - New Arizona and Iowa state proposals target geoengineering, despite limited evidence and no active SRM programs.

3/11 Image
Read 12 tweets
Feb 5
🚨Climate pathways to 1.5°C increasingly depend on land-intensive carbon dioxide removal (#CDR) like forestation and BECCS.

But new research shows these climate solutions could place major pressure on #biodiversity if deployed without safeguards.

Details🧵1/11 Image
2/ Using five integrated assessment models, the study examines where large-scale CDR is projected to occur & and how often it overlaps with biodiversity hotspots and climate refugia, the places most critical for species survival. Image
3/ The analysis focuses on a moderate but realistic deployment level of 6 GtCO₂ per year:
• 3 GtCO₂/yr from forestation
• 3 GtCO₂/yr from BECCS
Even at this level, land pressures are already significant.
Read 12 tweets
Jan 30
🚨The Politics of Geoengineering (book) is out, offering 1st comprehensive social science view of #geoengineering.

It examines political, legal, economic & societal dimensions of CDR & SRM, from Africa to the Asia-Pacific, amid urgent governance & ethical debates

Chapters🧵1/15 Image
2/ Chapter 01: Geoengineering has shifted from theory to contested policy, with technology outpacing governance. The analysis highlights political, legal, economic, and justice dimensions and calls for urgent global oversight.

link.springer.com/chapter/10.100…Image
3/ Chapter 2 examines Carbon Dioxide Removal (CDR) as geoengineering, analyzing CO2 extraction, storage, and conversion, with SWOT insights on techniques and implications for sustainable climate action.

link.springer.com/chapter/10.100…Image
Read 16 tweets
Jan 21
🚨Is carbon dioxide removal (#CDR) in the Arctic really feasible?

A new peer-reviewed study systematically assessed proposed Arctic CDR pathways and finds that feasibility is far more limited than often assumed.

DETAILS🧵1/14 Image
2/ As Arctic warms rapidly (4x) & attracts attention for climate interventions, can it host CDR at meaningful scale?

To answer this, authors conducted a comparative assessment of major CDR approaches proposed for Arctic regions, spanning both nature-based & engineered methods. Image
3/ The analysis draws on existing empirical studies, pilot projects, and modeling literature, evaluating each CDR pathway against biophysical constraints, technical readiness, environmental risks, and governance requirements. Image
Read 15 tweets
Jan 15
🚨2025 Year in Review: Solar Geoengineering Edition🚨

As we enter 2026, we’re excited to share our yearly summary for #SRM: "Solar Geoengineering in 2025: Rays of Hope, Clouds of Doubt."

Here’s what we cover in this comprehensive review:🧵1/11 Image
2/ 𝐖𝐡𝐚𝐭’𝐬 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐝 𝐢𝐧 𝐨𝐮𝐫 𝟐𝟎𝟐5 𝐫𝐞𝐯𝐢𝐞𝐰?
1️⃣ Rising Temp & Escalating Climate Impacts
2️⃣SRM Funding Announcements
3️⃣Top SRM Stories
4️⃣Restrictions & Bans on SRM
5️⃣Essential SRM Reads
6️⃣SRM in Media
7️⃣Research Highlights
8️⃣Our Work Across Geoengineering Image
3/ 2025 was the third-warmest yr on record. @CopernicusEU shows the last 11 yrs were the warmest ever, with the global average temp in yrs 2023-25 exceeding 1.5 °C. Top climate disasters caused $120B+ in losses, intensifying debates over mitigation, CDR & SRM. Image
Read 12 tweets
Jan 8
🚨Oceans struggle to absorb Earth's carbon dioxide as microplastics invade their waters, a new study finds.

#CarbonSink #CDR #CarbonSequestration

DETAILS🧵1/12 Image
2/ The ocean is Earth’s largest carbon sink, absorbing vast amounts of CO₂ from the atmosphere.

But tiny plastic particles under 5 mm (microplastics) are now everywhere, from deep sea to Arctic ice, disrupting this natural system. Image
3/ When microplastics enter the ocean, they interact with phytoplankton, the microscopic plants that absorb atm CO₂ through photosynthesis.

Even tiny plastic particles can shade, stress, or damage these organisms, reducing their growth and carbon-fixing ability. Image
Read 13 tweets

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